What does it mean that Christ is the 'Lord our righteousness'?

The title 'the Lord our righteousness' signifies that Jesus Christ is not only the fulfillment of the law but also the very foundation of our righteousness before God. This concept is rooted in Jeremiah 23:6, where the Messiah is prophesied to be our righteousness. Through faith in Christ, we are clothed in His righteousness, which replaces our own sinful state. This exchange emphasizes the theological truth that our righteousness comes not from our works but from Christ's finished work on the cross, as articulated in 2 Corinthians 5:21, where God made Him who knew no sin to be sin for us.